Method for fabricating electrodes

Abstract

This invention relates to a method for preparing an improved electrode comprised of titanium and platinum joined to one another in such manner as to resist separation by corrosion when utilized in a cathodic protection system in a corrosive environment such as in a shell and tube heat exchanger.

What is claimed is: 
     
       1. In the process of fabricating electrodes for use in cathodic protection systems installed in corrosive atmospheres such as heat exchangers, such electrodes employing titanium and platinum, the improvements which comprise: a. mill one end of a titanium rod;   b. drill and tap a hole in the inner portion of said milled end;   c. slip fit a platinum cylinder about the milled end of said titanium rod and   d. secure the platinum cylinder about the milled end of the titanium rod by inserting a titanium locking bolt into said drilled and tapped hole.   
     
     
       2. A process as set forth in claim 1 in which at least the milled end of said titanium rod is cooled to a temperature of approximately 0°-10° C. before said platinum cylinder is applied thereto. 
     
     
       3. The process of claim 2 in which the platinum cylinder is slipped over the cooled milled end of the titanium rod and the resulting assemblage is permitted to return to ambient temperature.